Audio cleaning function?

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  Hi all

  I'm building a small DLL (for use from matlab) for acquisition of data. One of the functions may take several hours: streaming over 1 million samples in a file. So for this particular function, I want (read: I'm trying) to run it as a background operation in a separate thread. After reading a quick guide OR the multi-threading I selected the following:

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  Q2: are there different approaches/examples that don't just want I want?

  Thanks in advance, Jos

  Use: Labwindows/CVI 8.0.1

  / * some administrative global variables * /.

  public static int PoolHandle = - 1;
  public static int ThreadHandle = - 1;
  public static int ThreadSamples = 60;
  public static int ThreadStatus = 0;
  public static int ThreadTimer = - 1;
  / * cleanup function * /.

  void CVICALLBACK FBGLAB_ThreadCleanup (int poolHandle, int functionID, unsigned int, int value event, void * callbackData)

  {
  int counter = 0;
  int Status = - 1;
   
  Delay (0.2); / * short wait so function thread can close * /.
  printf ("starting pool clean up\n");
  CmtGetThreadPoolFunctionAttribute (PoolHandle, ThreadHandle, ATTR_TP_FUNCTION_EXECUTION_STATUS, & status);
  While ((status< kcmtthreadfunctioncomplete)="" &&="" (counter=""><>
  {
  Counter += 1;
  Delay (1.0);
  }
  If (status<>
  {
  / * finish the thread after timeout * /.
  CmtTerminateThreadPoolThread (PoolHandle, ThreadHandle, 0);
  Delay (1.0);
  }
  CmtReleaseThreadPoolFunctionID (PoolHandle, ThreadHandle);
  CmtDiscardThreadPool (PoolHandle);
  DiscardAsyncTimer (ThreadTimer);
  ThreadHandle = - 1;
  ThreadTimer = - 1;
  PoolHandle = - 1;
  }
  / * simulated stream * /.

  int CVICALLBACK FBGLAB_ThreadStreamingWavelength(void *functionData)
  {
  ThreadStatus = ThreadSamples;
  While (ThreadStatus > 0)
  {
  Delay (1.0);
  ThreadStatus-= 1;
  }
  ThreadStatus = 0;
  Return (0);
  }
  / * async-timer callback * /.

  int CVICALLBACK FBGLAB_Timer(int reserved, int timerId, int event, void *callbackData, int eventData1, int eventData2)
  {
  If (event is EVENT_TIMER_TICK)
  {
  printf ("State of Thread is %0d\n", ThreadStatus);
  ProcessSystemEvents();
  }
  Return (0);
  }
  / * part of the function to retrieve the status of streaming * /.

  long __stdcall FBGLAB_GetStreamingStatus (long lDevice, char * response, long BufferSize)
  {

  int Status, FunctionStatus;
  Status = CmtGetThreadPoolFunctionAttribute (PoolHandle, ThreadHandle,
  ATTR_TP_FUNCTION_EXECUTION_STATUS,
  (& FunctionStatus);
  }

  / * Start simulated stream * /.

  long __stdcall FBGLAB_StartTest (long Nsamples, double SampleInterval)
  {
  int Status = 0;
  If (PoolHandle > = 0) return (FBGLAB_ERROR_MULTIPOOLEXIST);
  If (ThreadHandle > = 0) return (FBGLAB_ERROR_MULTITHREADEXIST);
   
  If (status > = 0)
  ThreadTimer = NewAsyncTimer (1,0, -1, 1, FBGLAB_Timer, 0);
  If (status > = 0)
  Status = CmtNewThreadPool (1, & PoolHandle);
  If (status > = 0)
  Status = CmtSetThreadPoolAttribute (PoolHandle, ATTR_TP_THREAD_PRIORITY, THREAD_PRIORITY_HIGHEST);
  If (status > = 0)
  Status = CmtScheduleThreadPoolFunctionAdv (PoolHandle,
  FBGLAB_ThreadStreamingWavelength, NULL,
  THREAD_PRIORITY_HIGHEST,
  FBGLAB_ThreadCleanup,
  EVENT_TP_THREAD_FUNCTION_END, NULL,
  CmtGetCurrentThreadID(),
  (& ThreadHandle);
  Return ((long) Status);
  }

  Hello again,

  It seems that the solution is as simple as the cause.

  -J' I create a pool of threads of high priority and program a priority acquisition function. Planning is done with CmtScheduleThreadPoolFunctionAdv. I do not use the option for a reminder at the end of this threadfunction.

  -A second more later (or in the service of acquiring) I schedule a cleaning of normal priority in DEFAULT_THREAD_POOL_HANDLE. Planning is done with CmtScheduleThreadPoolFunction. Inside this function, I wait until the acquisition thread is finished: CmtWaitForThreadPoolFunctionCompletion

  -Because all these functions are to 'demand' the original calling function returns. I get the prompt matlab for other tasks.

  I have to check what expectation-statement requires less processing for example power CmtWaitForThreadPoolFunctionCompletion or delay with the State Audit.

  But I have already seen that this combination:

  -start the acquisition in a high priority thread pool

  -then release the assignment of function and removes the high priority pool

  -During this time I had the back guest matlab and can run another task

  Thanks to everyone for their contribution, Jos

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  Hi all

  My first problem I can't understand mine. I did a search through old messages using several key words and couldn't find it.

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  -New firmware dated 12/27/09

  Mode - MSC

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  Hello

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  2. click on sound in the results of search at the top of the start menu.

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  Disable sound effects has no effect.

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  I guess I should install a 1394 PC card, plug my PreSonus audio interface and see if that has the same problem.

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  I broke it up to its simplest form:

  
  
  
  
  
   
   
  

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  her var = 'Right ';

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  I thought I had found a work around for this in this way:

  her var = 'Right ';

  function playSound (sound) {}
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  1. I wasn't able to play wav files so I had to convert all audio files to mp3
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  Here is an article that deals with extensions:

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  {
      import flash.media.Sound;
      import flash.media.SoundChannel;
      import flash.media.SoundTransform;
      import flash.net.URLRequest;
  
      import webworks.extension.DefaultExtension;
  
      public class CustomAudio extends DefaultExtension
      {
          public function CustomAudio() {
              super();
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          override public function getFeatureList():Array {
              return new Array ("blackberry.custom.audio");
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          public function playFile(eFileName:String, eLoops:int, eVolume:Number, ePan:Number):Number {
              var req:URLRequest = new URLRequest(eFileName);
              var snd:Sound = new Sound();
              var channel:SoundChannel = new SoundChannel();
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              var sndTransform:SoundTransform = new SoundTransform(eVolume, ePan);
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          }
  
          public function setVolume(eSoundID:Number, eNewVolume:Number):void {
              //this method has been disabled
          }
      }
  }
  

  It will be useful.

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